I cannot set two buttons on CAknToolbar. It always shows three buttons. Where is my mistake?

Code:
(*aToolbar) = CAknToolbar::NewL(R_EMPTY_TOOLBAR);

(*aToolbar)->AddItemL( iCallback->CreateToolbarButton(aLeftIcon, EFalse), EAknCtButton, 
     aLeftCommandId, 0, 0 );
(*aToolbar)->AddItemL( iCallback->CreateToolbarButton(aCenterIcon, EFalse), EAknCtButton, 
     aCenterCommandId, 0, 1 );
Right button is always dublicate of central.